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Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative assets	$ 181.3	$ 205.3
Derivative payables	(5.6)	(44.4)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative assets	134.3	139.9
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative assets	47.0	65.4
Derivative payables	$ (5.6)	$ (44.4)

X

- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 210
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